True/False
Indicate whether the
statement is true or false.
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1.
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The assignment operator ( = ) can be combined with the arithmetic operators ( +,
-, *, / ) to provide extended assignment operators, i.e. +=, -=, *=, /=.
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2.
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m++, m=m+1, and m+=1 are all equivalent expressions.
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3.
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If a single statement follows an if or else statement the braces
are not necessary, i.e.
if( ... )
statement
else
statement
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4.
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A class can include only one constructor.
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5.
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A method can only have one return statement.
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6.
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Constructors are methods.
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7.
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Constructors can not be overloaded.
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Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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8.
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The process of creating a new object is called:
a. | encapsulation | c. | instantiation | b. | class | d. | new |
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9.
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Which characteristic of an object says that at any moment its instance variables
have particular values.
a. | state | c. | identity | b. | behavior | d. | instantiation |
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10.
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What is the name of a method that indicates how to initialize a new
object?
a. | initializer | c. | mutator | b. | constructor | d. | accessor |
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11.
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What are activated when the keyword new is used and at no other time.
a. | accessors | c. | constructors | b. | mutators | d. | methods |
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12.
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What is the result of the integer expression 9/4?
a. | 1 | c. | 2.25 | b. | 2 | d. | an error will
occur |
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13.
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Which operator has the lowest precedence?
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14.
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Which of the following is an assignment statement?
a. | int number; | c. | 34*11 | b. | int number = 23; | d. | total = num1 +
num2; |
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15.
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Which Java operator is used to create objects?
a. | new | c. | instantiate | b. | create | d. | obj |
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16.
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Which of the following is an expression?
a. | count + 1 | c. | factor * weight | b. | 3 + 7 | d. | All of the
above |
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17.
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What must appear to the left of the assignment operator in an assignment
expression?
a. | a variable | c. | a literal | b. | an expression | d. | a class |
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18.
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Which of the following represents a legal declaration?
a. | double width, int height; | c. | double width,
height; | b. | double width, double height; | d. | double: width;
height; |
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Completion
Complete each
statement.
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19.
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Constructors with empty parameter lists are called ___________
constructors.
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Short Answer
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20.
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What is the concatenation operator?
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21.
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Name two visibility modifiers.
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22.
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What modifier is used to declare a constant?
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